AMMON, U. (2020). The position of the German language in the world. Routledge.
Chicago Style aipamenaAMMON, Ulrich. The Position of the German Language in the World. Routledge, 2020.
MLA aipamenaAMMON, Ulrich. The Position of the German Language in the World. Routledge, 2020.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.